If publish_future_post is called before its time, It creates a duplicate entry

Description

when the publish_future_post hook is called, ahead of its time, it'll attempt to cancel the current scheduled event, and schedule another, However, at present, this fails to work 100%

The issue is, That the $args need to match exactly, the event is originally scheduled with array( (string)$ID ), however, the clear/reschedule gets called with array( (int)$ID) which causes the cron ID key to differ slightly, which results in the first schedule not being canceled, and a duplicate schedule being created (with an int as the ID instead of the ID as a string)

(In addition to that, It seems the clear schedule call isnt passed a array too, which results in the key being different again..)

The $ID gets set to a int, thanks to get_post() accepting the ID by reference, and then typecasting it to an int.

The attached patch typecasts it to a string as well as wrapping it in the missing array()

In normal working environments, this shouldn't occur at all, and if it does, the schedule will be duplicated only once due to the 2nd and future sharing the same key.